— Two crowns — Same mass, different density — Vertical slider ✓ Slider works — Slider controls crowns — Slider direction correct — Full slider range — Fall animation ✓ Water displacement ✓ Rising water level — Splash effects ✓ Physics correct — Live mass value ✓ Live volume value — Live density value ✓ Live displaced water — Gilded displaces more — Heureka animation ✓ No external deps ✓ Light bg / dark text ✓ Self-contained HTML
Implements generic Archimedes buoyancy with horizontal sliders and a button-toggle immersion model, but has no crowns, no vertical slider, no fall/splash animation, no Heureka moment, and no crown-specific mass/density comparison — almost entirely off-prompt.
Implements generic Archimedes buoyancy with horizontal sliders and a button-toggle immersion model, but has no crowns, no vertical slider, no fall/splash animation, no Heureka moment, and no crown-specific mass/density comparison — almost entirely off-prompt.